I wouldn't write off Rochdale beating Wimbledon at all. I'm not even sure a Rochdale win could be considered a shock result tbh as Wimbledon despite their recent good form aren't exactly world beaters. But if you want to say it would be a shock we've seen much bigger shock results than that happen over the years and even this season - so I think it's not a banker.
I think that game is going to be decisive for everyone in the relegation battle and could go either way.
Rochdale are used to last minute runs of form, upsets and great escapes. Plenty of opposition fans in multiple seasons gone by wrote them off and yet they're still here. We obviously hope they won't do it this time but I think you can't underestimate the clubs survival instincts in these final 3 games.