I just hope for a Metroid Prime Trilogy.
With Prime 4 being started again from scratch I'd think this is VERY likely to happen to tide people over. I don't think we'll see Prime 4 before 2021. Whether it's at e3 or announced later in a direct, I fully expect a Metroid Prime Trilogy to be released in 2020.
Predictions (Made July 2019)
LTD: PS4 - 130m, Switch - 110m, XBO - 52m 2019 : PS4 - 15m, Switch - 18.8m, XBO - 4.8m 2020: Switch - 22m (Peak Year)
Switch lite really screwed up my Switch prediction this year! Looks like it's going to be about 19.5m-20m for the Switch in 2019, 14.3m for PS4.