Nasuto was for a Battle at Big Rock tie in. But they still gave it for free to all players.
Microceratus has little to do with JP30 (It was bred back in 1986 as told by Dominion, it was also in the original novel, but I don't think that gives it enough credence). It has everything to do with Jurassic World Dominion, the movie this game is heavily based on. The film that got $40 USD worth of DLC and still omitted the Microceratus for almost a Year. It wasn't in Dominion Biosyn (rightfully since Micro wasn't in the Biosyn Valley) and it wasn't in Dominion Malta (where it should be since it was notable in Malta)
And ultimately, this is a Jurassic WORLD game and Microceratus is a Jurassic WORLD animal from Jurassic WORLD Dominion. Rightfully it should be here.
Microceratus itself has been a point of contention for a while. People wanted it back in JWE1, it never game, we wanted it in JWE2, didn't come, It was in Dominion but never appeared in the DLCs, it wasn't a part of the JP30 where it could've been apart of a Legacy DLC but that never happened, they had 2 DLCs they could have used to add it, it wasn't. So let's be honest, if not with the Second Anniversary, it's probably never coming.