I have an idea its just the events in the middle that lead to the end i have trouble executing.
Well, i have to admit, I do have an ending, but it's very very vague! Haha. I don't plan for my story to be very long and for some reason, it's just easier for me to see the end without the details. I'm only about a chapter ahead in writing and I really need to step it up!
Already plan it. It's going to be EPIC with everything concluded and revelation will be out and epic stuff will happen...
And i need a hella lot skill's to pull it off... fortunately it's still a LONG way to go so hopefully I can manage to improve
myself along the way... hopefully.
@ghostnxs how about you?
haha, nope that's why I'm starting to write short stories/ one shots so I can practice writing and finishing(I have a problem not doing that).
I have it very clearly written down how my current ongoing story should end. The ending changed a few times over the last few years, but it became obvious after a while. I find it extremely hard to start drawing a story without working out a conclusion first during the writing process.
I'd normally just wing it but I bet that would be a bad idea, especially for a long story. I get bored of long planning.
Oh yes, I have a solid idea how I want my story to end. And even if I make some changes to the meat of the plot, I still know the direction I need to go. 
I have two similar endings I need to choose from for my horror comic... I need to fully write it out in script form as well.
It usually is beneficial to think of an ending as you're creating the beginning, so I did that with my newest comic too.
Main ending, yep!
Endings between chapters/arcs....much harder for me.
My writer: "I know you want X to happen in Y chapter, but what are you looking for as the ending to Y and Z chapters?"
Me: ╮ (. ❛ ᴗ ❛.) ╭
I have the preferred ending that I would ideally like to reach, and I have the emergency ending for if my health gets too poor and I need to stop drawing comics.
Hopefully I never have to use the emergency ending.
I know how Grassblades ends. I haven't worked out 100% of the details yet (there's a certain character who I haven't decided if they survive or not, and I don't know whether I'll end it right after the climax, or whether I'm adding an epilogue), but I know where I'm headed.
Being a sprawling, very long story-format comic, Grassblades needs to have a bit of structure to it; if I was just winging it, I'd write myself into a corner. There's going to be lots of stuff going on further down the line, and I need to know where everything is going so that all the separate characters and subplots keep heading in the same direction.
I have the whole story planned out!
Not that it matters, because at the rate I'm doing it, I'll probably die before I finish it. 
With the future series ideas I've come up with, I generally have the beginning and the end realized. Then as I begin to work on it, I do my best to have my characters get to that end, even if it takes forever. Kinda like the One Piece. We know Luffy's gonna get it at SOME POINT, (it's in the freaking title for crying out loud) but 70+ volumes in between? Is it ever gonna happen? Do we even want it to happen? Yes, but the journey is just so darn fun, it'll be sad to see it all end.
I know exactly how the comic will end, and it's really helped us stay focused on what should/should not be in the storyline. The way I work is when I'm writing I have to ask myself, "Okay, how does this serve the ending?" In many cases, this helps me realize what's just fun, and what's absolutely necessary to keep in mind to go from beginning to end. It also helps me figure out what needs to go in the middle.
Calling your beginning Point A, you know what happens here. So let's say you decide that Point Z is the end. But what goes in between? By knowing your ending you can better figure out what's going on. You can figure out your path from A to Z by marking out destinations between. This process has helped us keep our story tight and focused, but still gave us room to have a little fun without wandering off into the left field.
-C
I did some small changes in both of my comics (Dreamcatchers1, Furusato House1), but I know how they will end. I usually write down every chapter's happenings. Although I started to draw them before I knew how they'll turn out to be. But with years I realized that it's better to know what you're doing.
I've been working on Time Gate coming on 10 years now and I just discovered how I want it to end several months ago. Everything leading up to that ending, I still have to work on (it's a long series, still a lot of kinks to work out), but I have how I want the series to "end", in this case, after that one scene, roll credits.
Once I discovered how I wanted it to end though, it was like that big "EUREKA" moment. I've had that moment for a lot of scenes and stuff in Time Gate, mostly because I let the characters guide me through it, in a weird "discovering" their journey vs. "creating" it sorta way.
I know how Daniel is going to end, but there are a couple of details about it that I need to put my foot down on. ^__^;
I also somehow ended up thinking of alternate endings for it along the way, but so far my original ending still seems to best to me, so sticking with it. XD