Hi, out of curiosity: on what criteria does one unban a pokemon of Uber (banned for one generation and retest the next gen)? For example in Gen 6, we had:
* quickbans: Deoxys-N, Blaziken, Gengarite, Kangaskhanite and Salamencite
* suspect-test: Lucarionite, Genesect, Deoxys-S, Deoxys-D, Aegislash, Mawilite, Greninja, Landorus-I, Shadow Tag, Hoopa-U and Sablenite (I do not count Metagrossite)
It seems to me that Darkrai, Shaymin-S and Deoxys-A were very briefly in OU during BW (it's more for the anecdote)
The unbans in Gen 7 are: Greninja, Hoopa-U, Mawilite, Sablenite, Genesect, Aegislash and Landorus-I (the last three are returned in Uber). It is understandable that those are the pokes that have been the subject of a past suspect who can return to OU. So, why not retest Deoxys-S, Deoxys-D and Shadow Tag in Gen 7 (Lucarionite is less obvious)?
Aegislash is the only one in Gen 6 who returned to OU the time of a suspect (in May 2015). On what criteria? Can we imagine a retest of Metagrossite or Pheromosa (for example) in one or two years?
If we look at Gen 8, we can reasonably imagine the return of Gsect, Lando-I, Aegi or Deoxys? It's just once again out of curiosity