To me its far too early to decide, too many unknowns. In my ideal world IMO RGL and the Twiikuu project collaborate, because I trust the twiikuu team, and RGL can offer the prize pool. The twiikuu group I believe also has the best relationship with ETF2L and ozfortress which would mean we have the best chance at finally having a unified format across every league, even if it results in changing ETF2L/OZF current format. Not that that isnt still a possibility under RGL on whole, but I just think the likelihood increases.
With what we know so far though, RGL sounds like the winner.