Yes, Barcelona is lucky enough to be in the same group as Royal Antwerp, Porto and Shakhtar Donetsk, ideally they will get through the group phase easily, but the reality is that we don't know whether Barcelona can get through easily or not.
September 20 they will have their first UCL match and face Royal Antwerp, playing at home will certainly be the basis of their motivation, 3 points are in sight it seems.
Royal Antwer is a very easy opponent for Barcelona and Barcelona should get a very easy win in this match. If Barcelona do not make any big mistakes against Royal Antwerp in the Champions League, Barcelona will definitely win this match by a big margin. Barcelona are very lucky because they have an easy opponent where other teams would be up against tough authorities. As much as we think Royal Antwerp is an easy opponent, Barcelona should take this team as a difficult opponent because if taken as an easy opponent, then Barcelona will definitely perform poorly, as a result of which Barcelona will lose the chance to do well in this match. Opponents are never easy, opponents are always hard to beat. People who take opponents easy can never do well.
It should be like that, even Royal Antwerp don't have a good record for the start of their season in the Pro League, from 5 matches they could only collect 8 points which means they lost 7 points from the full points they should have gotten.
The unique fact here is that this meeting is the first meeting of the two teams, so any result can happen because we don't have at least 1 reference to use as an indicator. It seems that I would prefer to bet on the Handicap bet for Royal Antwerp.