Fallout on Switch, New title secretly being developed by another studio like Obsidian, or a F3 remaster since it's the ten year anniversary
F3 remaster would make sense since they cancelled the fan made remaster so quickly when they literally never do that.
Fallout 5 is impossible, only been 3 years. A new Fallout mobile cash grab would make sense, but not to the point that they would hype it up this much pre announcement.