I believe the rule is 5 teams in 6 years, and no back to back, so here are the teams who have already gone, among the 6 teams in consideration with a 2017 participant in red. I'm removing the five 5-7 or worse teams; also Michigan and Ohio State, who are locks for NY6; and Penn State who will either be NY6, or a lock for the Citrus if not, no way they take anyone else if they have the option.
TIER 1
CITRUS: Minnesota
OUTBACK: Iowa, Northwestern, Wisconsin
HOLIDAY: Michigan State, Minnesota, Wisconsin
TIER 2
GATOR (most likely not Music City): Iowa
TIER 3
PINSTRIPE: Iowa, Northwestern
REDBOX: Purdue
The Quick Lane Bowl becomes possible if Penn State falls to the Citrus. The problem is that beyond Penn State being a clear top choice for the Citrus Bowl, there is no obvious pecking order. Iowa is 8-4, Northwestern is 8-5 (for purposes of this, everything changes if Northwestern wins and gets the Rose Bowl), MSU and Wisconsin are 7-5, Purdue and Minnesota are 6-6.
There used to be a rule that 6-6 teams had to go last, meaning those two teams would fill out Tier 3, and it would be Purdue to the Pinstripe and Minnesota to the Redbox to avoid repeats. Not sure if that's still the rule. That leaves MSU, Iowa, UW and NW for the top 4. That would all but guarantee MSU the Outback to avoid repeats, since it's possible. So Iowa would avoid the Gator and Wisconsin would avoid the Holiday. My guess is Northwestern's small fan base gets trumped here, and Wisconsin goes to the Citrus, Iowa to the Holiday and Northwestern to the Gator.
This all gets thrown off if Northwestern wins, or Penn State doesn't get a NY6 bid.