Cologne is a bottom team that has not improved in performance so of course Leipzig will be the favorite to win the match.
The great motivation for Leipzig to finish in the top 4 makes me have no doubts about betting on the same thing as you, namely on Leipzig winning, I think they will win this match easily.
You are right that Cologne is on of the Teams that are at the bottom on table , but they played last weekend a 3:3 draw against Gladbach.
So there is a chance that they have took some energy out of that last game and bring that on the field today.
But i guess it will be not enough against Leipzig as they are for sure want to win , fingers crossed our bet will come true.
Obviously, on paper Leipzig really has a very good chance of being able to win against FC Koln in today match, even though Leipzig plays away but that will not prevent Leipzig from getting full points in this match. Because after all, in their first meeting this season also the fact that Leipzig managed to beat FC Koln with a big score of 6-0. But apart from that, although Leipzig can be said to have good dominance against FC Koln, but at least FC Koln is also quite often holding Leipzig to a draw. Therefore, then at least FC Koln will still be able to provide resistance to Leipzig in this match but indeed, in the end FC Koln will lose because of the bad trend that FC Koln has experienced so far this season.