A few years ago there was a crossover SEGA game that was going to be released on mobile phones but after some screenshots the game just seemed to disappear. Guess what, it was released but without SEGA references and ironically or maybe as some kind of vengeance, the games is full of Nintendo references. The game is called Guardian Tales, an awesome and very funny game that unfortunatelly lost the SEGA branding. https://www.reddit.com/r/GuardianTa...uardian_tales_once_know_as_sega_blast_heroes/
Yes, it was around 2016 that it was leaked, I remember finding about it when I was searching about SEGA Heroes and I was drawn by the cute chibi art style. It it is a real shame that the games was scrapped because the writing on this game is very creative and funny. It would be one of the best SEGA mobile games for sure.