If the B10 wants to compete with the SEC, let's look at power teams (blue bloods).
SEC:
Bama
Auburn
LSU
Georgia
Florida
Texas
Oklahoma
Good fball history but not quite blue bloods: Tenn & A&M
B10:
OSU
Michigan
Good fball history but not quite blue bloods: Penn St, Neb, Wisc, maybe Mich St
If the B10 wants to compete, they need to make a big splash & get more big brand football teams. Who? ND, Clemson, Fl St - maybe Miami & Virginia Tech. It would make sense for an alliance between the Big 10 & ACC but I feel an attempt to poach would come first. The Big 10 adding SU, BC, NC or Virginia does not move the needle anywhere near enough. As for the Pac - who do they have that is a big time football school - USC is about it. More recently Oregon. Stanford & UCLA (history but not really power football teams lately)