You're underselling it. They will band together to invent a time-machine, so that they can send a workable spell-less Ranger back to 2013.
Well yeah, but then Mearls & Crawford will send a special agent, named Kyle Reese, into the past in order to thwart them!
Mearls: Reese. Why me? Why does it want me?
Reese: There was a nuclear war. A few years from now, all this, this whole place, everything, it's gone. Just gone. There were survivors. Here, there. It was the AI, Mearls. The AI.
Mearls: I don't understand.
Kyle: Role playing AI. New... powerful... running D&D all the time. They say it got smart, a new order of intelligence. Then it saw all people as a threat, as a threat to having spell-less Rangers. Decided our fate in a microsecond: extermination.
Mearls: Did you see this war?
Reese: No. I grew up after. In the ruins... starving... hiding from H-K's.
Mearls: H-K's?
Reese: Hunter-Killers: patrol machines built in automated factories. Most of us were rounded up, put into camps where we would just play D&D night and day, but the only class we could choose was a spell-less ranger. Some of us were made to DM .... just so we could shoot down any attempt to cast spells. The games ran night and day. We were that close to going out forever from exhaustion. But that wasn't enough for them, Mearls. No. They had to get rid of casting "hunter's mark" forever. They had to go back and end it at the source. They had to end ... you.