That's some wild speculation there and I think I will go completely against it because arsenal don't have the tenacity to actually win the champions league yet although they have a great team and also playing pattern the winning power isn't just there and besides they were paired against their arch nemesis that always get the worse out of them which is Bayern Munich so they should first think of a way to eliminate Bayern Munich first before setting hopes for dreaming about securing the trophy.
I've also heard a few other person mentioned this same thing you just spoke about and I think would want to buy into this idea because actually Arsenal has got a very good Olay and their performance aswell has been a very good one that can be dispute but they don't seem to have that tenacity like you did stated to be able to pose a threat in the champions league and they will most likely face a. Defeat in their next fixture.
With little to almost no experience I doubt how well Arsenal will be able to defeat Bayern Munich to proceed to the next level of the champions league because going by the records Bayern Munich seem to have enough record much more than Arsenal as they have won the champions league more than Arsenal has every gone to the finals which shows a sense of more experience much more than Arsenal has ever had in the champions league before. I actually didn't believe Arsenal so much with the champions league but then I was trying not to be too fast with my judgement .
If Manchester Arsenal get to pass this stage then it's very likely they will get to the finals but then Bayern Munich seem to have a whole lot of presumption they will be coming with which I doubt if Arsenal will be able to stand the pressure enough to still remain in the league,this may possibly be the end of their journey especially if they eventually get knocked out by Bayern Munich which is very probable to happen.