I would never had suggested this in the past, however [competitor] seems very agreeable to licensing out GI Joe to other companies. We've seen some brick toy sets popping up at discount retailers (sorry, I don't know the company's name who is making them). Super7 is making 7in figures based on the 80s GI Joe cartoon as well as 3.75" figures. So maybe it's possible for Mega Construx to get the license for GI Joe.
Call of Duty seems to be on life support at Mega Construx. Maybe it's time to move on to GI Joe if possible as a replacement. There are a lot more characters and identifiable vehicles which could make for buildable sets. Maybe even existing Call of Duty parts could be reused for a GI Joe line.
Again, I would have thought something like this wasn't possible, but these days it seems like it could happen. GI Joe Mega Construx sets would do very well right now, as GI Joe is having a resurgence in popularity.