I don't know if it will help, but Buzzfeed Unsolved (on youtube) has a number of interesting videos that discuss some of the most famous alien abductions, sightings, etc. They're well researched but super cute and funny because the guys discussing it banter and joke as one explains to the other. I don't think they'll give you an idea, but they're conversations might inspire you. They discuss a lot of theories.
People of Earth might also interest you. I haven't seen a lot of it, but everything I have seen was REALLY good. It's got a pretty original alien invasion story line, and hits on all the "types" of aliens, ala Greys, Whites, Lizard Men. Basically taking established conspiracy theory and lore and running with it. Alien abductions are a big part of that too, so maybe it would help you there.
As far as offering a unique idea.. I suppose you need to decide what the alien's over arching goal is, and then how human experiments fit into that. Aliens could be trying to create super soldiers, perfect beings, they may be studying people the way we study the unknown. Or is it part of a plan to take over the world? Has our human boy been implanted with something, brainwashed in some way... etc etc
Sorry I don't have any clever ideas off the cuff. I DO think the two media sources above could be helpful and fun. And if you want a direct link to relevant Unsolved episodes, let me know, and I'll message you with some.
Good luck! I think it's a great idea for a story, so do your best! 