AVMMC was actually one of my favorites. Although it was a television movie, it was done with great affection and intent by the studio, which intended to relaunch the franchise in style. You are right, Dwayne1115, that TM as sort of the flip side of AVMMC. In the first, Kermit realizes how much the muppets need HIM, and then he realizes he needs them. In TM, Kermit realizes that HE needs the muppets, and is staggered and humbled to realize that THEY need HIM, too.
In both of those, central to Kermit's leadership and happiness is recognizing Piggy's rightful place as the love of his life. Kermit is not Kermit without Miss Piggy's yin to his yang. Ironically (and IRRITATINGLY), BOTH of the newest muppet movie books have him actually confessing that love for her without any backtracking. We didn't get to see the actual confession on screen--just the effects of it.
I have joked about it quite a bit here, but there seems to be some sort of insidious assumption that Kermit admitting he cares about Piggy--loves her, wants her, wants to be with her--is somehow detrimental to him. Nothing could be farther from the truth. Kermit's happiness and his undisputed (well, mostly) place as leader of the muppets is wrapped up in him acknowledging his place in the great scheme of things, and that includes loving and being loved by Miss Piggy.