>>35673391>>35673508To be fair, they've stated that they regretted announcing Sun and Moon so soon.
Personally, I won'f believe the game will come out in 2018 if fhey only annoubce it at E3. But if they do it in this following week, then they can still use E3 to reveal more details and gather hype, leaving them almost 6 months to build up to the game's release.