If you liked Fenway, you'll definitely love Wrigley. there is certain stadiums/arenas in sports that just have a different atmosphere and experience, it is special. I've had the privilege of going to Fenway/Wrigley and Madison Square Garden in the past year, and they are just so different than the normal sporting events ill go to (Wizards games in DC, Sox games in Baltimore/DC, etc).
Cubs/Sox world series would be absolutely amazing, I've been hoping for one for a while.