Ok, this should not seem so far fetched. Given that we know the producers have said we will see Kirk and crew from TOS take over at the very end of the series, and that Ensign Pavel Chekov does not show up until season two of TOS, I propose we will see a (perhaps 3rd year) Cadet Pavel Chekov visiting the USS Enterprise at that time. Here is my casting proposal:
Russian born Mark Eydelshteyn. Born in 2002, he is 23 and could pass for 20. What do you all think?

Russian born Mark Eydelshteyn. Born in 2002, he is 23 and could pass for 20. What do you all think?