Although all versions follow the same idea (timeskip > Deku is now a UA teacher and also a hero with a special suit), each has a different tone and PoV. So how will Bones do it?
1 - They will use only the serialization's ending (Deku)
2 - They will use the epilogue's ending (Izuocha)
3 - They will use the special's ending (Eri)
4 - They will use all three in the exact order they came out
5 - They will create an ending combining the three in a new way
6 - They will create an original ending
7 - OVA/Movie