All home teams will win this round, which means Eagles, Rams, Chiefs, New England. If any were to lose, I think the Chiefs stand the best chance to lose. They clearly aren't the top-notch team they appeared to be at the beginning of the season. Teams that win in the playoffs play their best football at the end of the season. The Chiefs are clearly playing their worst (despite the blowout win to finish the season).
In fact New England is the only one really on a roll. The rest faltered. Especially the Rams, how could they lose to the Lions??
Naturally I'm a Patriots fan, so am somewhat bias, but if I felt they could get beat I would say so. Someone will beat them, but it won't be in January.