the in the live-action 2014 reboot uses the test subject origin story, but splinter is neither a reincarnation of hamato yoshi nor is he associated with him in any way. in fact, yoshi is written out of the script entirely and splinter simply learns ninjutsu from a discarded book after being mutated. in the movie, splinter tells april that he does not remember his life before being in a laboratory, implying that there may be more to splinter's character.