Its looking possible that 2027 could have GTA6, Witcher 4 and Elder Scrolls 6. It would be hard to imagine a bigger year in gaming.
A new Witcher 3 DLC is supposed to come out this year to bridge 3 and 4, so that could point to a Q1 or Q2 2027 release. Would be perfect timing for them, because its puts it in competition with GTA6, without being in direct competition with GTA6. A hotly contested GOTY campaign would be great for both games
TES6 in 2027 is more a possibility than a likelihood. I think Todd Howard said he expects it to release after GTA6. Horizon 3 is likely a 2028 game, given its history or tragic releases(same time as BOTW and Elden Ring) means its will likely release within a week of TES6 (not really, but......really)