Board Thread:General Discussion/@comment-1255374-20160326211319/@comment-26062541-20160425154344

Yeah that bugged me too, also I'm pretty sure since Past Leo never saw Splinter get back-stabbed, he might not warn his version of Past Splinter and might make a time-line where Splinter dies for real. Maybe when the past turtles went back in time to when the current turtles did, they somehow merged with them also having the same memories as them? OR- and this is the most likely, chalk it up to multiverse theory baby!

ALSO-if my theory is correct, from this point on there would be a constant creation of new 2K12 universes originated from that single point. That would be some Crisis on Infinite Earth stuff right there.