I feel like entities at Hasbro don't think there's a market for certain things, so they don't pursue them, but it's like, no, *I* am the market for those things. (Or, I would be if I had money. I was the market.)
Jem seriously needs to crossover with both Transformers and G.I. Joe at least.
There should be a cute Prince Starscream's Castle playset with some build-able Starscream figure that switches between all the various Starscream frametypes and which comes with a sparkly energon shower of tinsel and storage for his little capes and crowns and spaces for Mini-Cons and pet cats, and ponies, and a lady President to visit him.
GIJoe should have an adventure in Candy Land where the team needs to be outfitted in pink camo and other special new outfits and like candy-striped Holiday Prime or somesuch just shows up there.
There should also be some kind of Hot Rod's Garage playset with a converting Hot Rod figure and places to store all his zillion accessories and like car wash facilities and sticker sheets and just like radical bot-customizing supplies.
A variation on this could be like Bee and Charlie garage playset with some M.A.S.K and/or Human Alliance type scale figures.
What about mech suits that My Little Pony ponies can fit in to get around on Cybertron to join the battle against Quintessons or something?
Like, they've had some of this IP for decades and so much of it is still in these weird gendered markets that don't cross over with each other.
Also, I still want Menonia Risk board.