I am against a fusion between RETRO and Genesis UNI, I will explain why.
-First, Genesis was a uni with a speed multiplied by 3 where the players can have 20 planets and some players in this uni used a lot of urplasma to get huge advantage, like for exemple the first player in Genesis. I want to underline here that a fusion between a speed and a "normal" uni are not compatible, otherwise it would be unfair for the players playing on RETRO uni.
-A fusion between RETRO and Genesis won't bring a lot of active players into RETRO, indeed you can take a look on the genesis general ranking, it's really heterogeneous, and the top 100 goes from 286 millions points to ... 3 millions !!! It means that this fusion won't bring more than 100 active players without considering that a not negligible amount of players in Genesis already have an account on RETRO.
-To my opinion, this fusion will only bring several huge accounts from genesis to RETRO, but won't really help to fill with a lot of accounts the RETRO uni. These big accounts will now boost only their fleet + 14 of their 20 planets. They will choose to keep their best planets with roids and so the game won't be better for us, RETRO uni players.
Conclusion: I think that the only solution to make the game active again is the following one:
-RETRO, DEU and INT universes has to be regrouped in only one universe.
Indeed DEU and INT have more active players and their points are a way more homogeneous + their accounts has grown in a classic universe (no universe speed increase, higher number of planets...).