Spider Gwen Meets The TMNT
 

https://www.google.com/amp/s/comicbo...a-turtles-in-/

Spider Gwen's recent writer wrote a fan-fictional short crossover with the TMNT. Its as close as one can get to an official Marvel crossover these days.

Already a thread for it, dude

http://forums.thetechnodrome.com/showthread.php?t=60306

it was even on the first page of TMNT Comic Discussion section.