For the time being, no... as @ck_tapastic mentioned, optional cover banners (shown at the top of your series on the web, in place of the normal thumbnail) appear as a background image in the app, but we're not using the feature banners or tiles anymore. There's a small possibility we'd use the large, homepage banner-style artwork somewhere, but it's unlikely as we're trying to cut down on custom, one-off assets in favor of reusing more consistent pieces everyone can add to their series (i.e. thumbnail, cover banner, etc.).