re: Which SEC team is most likely to lose their opener?

I don't see LSU losing to WI. WI struggles at QB and has to replace their front 7 on defense. Their pass defense will be weak in some spots.

LSU has better athletes. Bret left talent at WI for LAST season and some of that talent is going to get drafted.

If LSU can maintain WI's running game, LSU will win.