In the world of MOTU, Teela is "Wonder Woman" because she's the only heroic female. He-Man is Superman, Man-At-Arms is Batman and Teela would be Wonder Woman. MOTU's trinity is similar to DC Comic's DC Trinity. As for the damsel in distress, everyone gets in trouble, even He-Man himself needs help from his friends--like the Slime Pit example.
That's She-Ra's cartoon. If you killed She-Ra in the mythos, MOTU could still continue without her, as we see in MOTU's original mini-comic mythos where there is no POP mentioned. That's where 4 Horde members can take over Etheria without an intergalactic empire or robot troops.This thread asks 'who is the female lead of MOTUC'. That's simple.
Take the Filmation cartoons. Kill Teela. Can the show continue? Yes. I can't remember for sure but there must have been episodes in which Teela did not even appear. Now take She-ra. Kill her. Can her cartoon continue? Nope. She's a lead character. It's as simple as that... :-)
As a Mattel employee? We saw Teela at SDCC twice--once during 200X, once during Classics.As for the Comic Con BG Teela, well I can remember a She-ra parading in costume at some ancient comic con edition. I think Mattel did 'Battle Ground' teela this year because it would save bucks thanks to the rather skimpy costume she's wearing. :-)