What would you want in a sequel?

[sdp]

So, after seeing the movie what do you want to see in a sequel?

This universe being a live action "modern" version of the OT is interesting and some of the choices in this movie whether you liked it or not give plenty of possibilities for fun sequels. For me this universe can get really wacky and have some of the more out there ideas for the turtles without problems, something a realistic gritty version of the turtles wouldn't have been able to make. that is at least a good thing about this take on them.

The Technodrome/Krang - I can totally see a technodrome or krang introduced in this movie series, maybe for a third movie, the technodrome is really out there but it can fight.

Mutants - I can see the movie having other mutants easily since it wouldn't be that out there in these movies.

Things I don't think will work very well:

Casey Jones? I'm sure he'll appear in one form or another but counting the turtles are like hulk in the movie I don't know if he would fit very well, maybe for some more "street" level stuff instead of having Vernon in that final battle..

A few rogues like the Rat King unless heavily modified.

please if you won't add anything to the thread don't post here with flame bait.