I doubt BM would win the CL this year, they are playing good but they always stall in the final matches, I think Pep would actually take a challenge if he picks a team that need work, he took BM when they were CL champions so taking a team needing allot of work and making excellent result will help prove his worth as a coach IMO.
This is pep guardiola final season in bayern munich so he may want to win the trophy. He always end the season with some good amount of trophy before he leave the club, he did that to barcelona as well and they are the winner of laliga before he leave the club so Im sure that he will try as hard as he can to try and win it