Not sure about that. Yes, Comcast/the Flyers control (and get all the money from) the parking lots surrounding and adjacent to the WFC and XFinity Live. The Eagles control (and get all the money from) the parking lots around the Linc. The Phillies control (and get all the money from) the parking lots around CBP and Pass & Stowe (which isn't as much of a going concern as the old McFadden's was).
But addressing another point you made about the Cubs and Astros starting rebuilds, yeah, it does seem like windows of opportunity are not as large as they used to be. Now, it seems as if teams do everything to build for and maximize a three year run before blowing it all up. Enjoying a long run like we had from arguably 2001 to 2011 may be a thing of the past for teams other than the Dodgers and Yankees.
And Andyb, yes, it's possible that the NL Central may be baseball's worst division next year. See also the Reds who are letting Bauer walk and trying to sell off parts just when it appears that they are coming out of their own rebuild. Not NFC Least bad but likely to be won by an 82-86 win team. And the Cubs are blowing things up while their ugly stepsister, the White Sox are on the rise.
Makes me wonder. If the Darvish deal was a fire sale with the Cubs sending no cash to San Diego, if Middleton and the Bucks are willing to absorb the at least $17 million owed to Kimbrel ($16 million for 2021, $1 million buyout or $16 million for 2022), is it possible the Phillies could get him for a song (though admittedly he hasn't been very good the last couple of years)?