Avenger's Campus is not very good...it just feels like a corporate office park (and Web Slinger is pretty lame...a very non-dynamic, non-energetic attraction for one of the most dynamic, energetic characters of all time). But I think they probably will get the rights back in the next 20 years as Universal will need to update that land, and will tire of paying royalties and evangelizing a brand Disney owns. They may even own DC Comics in the next 20 years.
I'd say that Disney may hold back on an Incredibles land in anticipation of likely bringing Marvel to the park someday but they don't seem to think ahead much (they consistently back themselves into weird corners with inexplicable planning decisions). So, sure, maybe they'd put Incredibles in Animation Courtyard, but then I'd suggest they find a different place at DHS for a Halloween Town, I think it would be very popular and sell more merch than Incredibles (or Monsters Inc.) and boost holiday season/event traffic more than either of those too.
As an aside, I think an Incredibles stunt show could be a good successor to Indiana Jones if/when they feel it's time to replace that show.