Normally, yes, but some things to consider:
Who is interested in a sprint royale ? QuickStep not, they will be happy if the group takes the big sprint points. Bora not, because Sagan couldn't catch up a lot of points then (will even lose some more points most likely). Same for Trentin/CCC. All other teams have not good enough sprinters, to put some guys at the front to chase the group, so they won't help. So that leaves all work to chase the group for Lotto and they only have 4 riders besides Ewan left Would be better for Lotto to put some rider themselves in the group (de Gendt) and then sit back and wait, if the groups get caught, where Ewan could then contest the sprint. But I don't think anyone will chase tomorrow, if Lotto has a rider in the group.
This is the last chance for a lot of riders and teams to win a stage, so expect a big group to try their luck with like 75% of the teams present there. The stage is relatively short and not easy control with quite some up and down, especially in the last 60km. All riders in the group will have a chance to win the stage, since although it's hilly, it's not too demanding, i.e. no team will say "ah, our guy is too weak, lets chase them down".
I think Sagan will try to get into the group, but QS won't allow of course. He will give up sooner or later and let the green jersey go and a Sagan-less group will determine the winner of this stage. If the group isn't too far away in the more hilly terrain, he could do some stunt though and go on the attack, maybe getting some help from Bora guys that managed to get in the attackers group earlier.