Sevilla and Arsenal may look good but lets not forget about Lens, they managed to beat Arsenal, not that I am saying they will keep doing that, but they already got a decent chunk of points, and they may get some more, I am guessing that they will make it hard for other teams. In that case, Lens and Arsenal going up, and Sevilla going back to Europa would be so funny to see.
There is a reason why people call it "the sevilla cup" and that would be fun to see. They are much more comfortable there and they have won it so many times, most recently the last one, and they could keep doing fine there as well. If they keep going with UCL then I am sure that they will lose next stage right away, but if they go back down to europa cup then there is at least a chance that they may do well. This season I am sure even Europa cup will be a hard one since there are so many good teams, but not like Sevilla hasn't beaten any good teams there before, they may do it again.
I think it would be very interesting to see Sevilla return to the European League and win the title again in that competition.
And actually, in the match against Arsenal, Sevilla is expected to have difficulties and will ultimately lose. Sevilla will indeed play as hosts but this will not change the fact that Sevilla's performance this season is quite bad. Even in Laliga, it turns out that Sevilla is currently ranked 14th. This is different from Arsenal, which is currently ranked 2nd in the Premier League standings.
Arsenal have never even lost at this point in the Premier League. and in their latest match they also managed to beat last season's Champions League champions, namely Man City. But losing to Lens in the UCL really made everyone doubt Arsenal in the UCL. But Arsenal should still be the favorite when facing Sevilla.
Lens is currently at the top of the group right now. Arsenal is right below them. The point difference is absolutely minimal between all the teams in this group. The points are 4,3,2,1 for Lens, Arsenal, Sevilla and PSV. If I am not wrong, this is actually the most competitive group in the Champions League competition in terms of points alongside group F. Which also has a similar points between all the teams and in that group, all the teams are really big.
Arsenal is definitely performing really well in English Premier League. But I wonder if they will actually be able to transition that good performance into the Champions League. Because both are very different kind of competitions.