The Konami games
 

I assume Nick has the rights to all or most all things TMNT. Are these just out there with no way to release them on current generation video game consoles, because a collection or digital shop download option seems like it would move a lot of titles and make money?

Konami still owns the rights to the game programming of all of their games. When Ubisoft re-released the original NES game and arcade game, and made Re-Shelled, they had to collaborate with Konami.