I would like to see some proof of this. Obviously, you're probably referring to some ancient posts from 2006 around the time when DP first started from "few" members who wanted Misty to make an appearance over May. I think that's what you want. You want to draw "those" specific people out...Well sir, good luck with that!
In other news, it was pretty much a given that May's chances of making an appearance were better for her, she was the last previous main character to DP, and she was a coordinator just like Dawn was. The writers threw her in there since you all were wrong about May sticking around for DP. Lol. I mean, honestly, a lot of you all thought that just because DP had super contests, that May would stay to advertise them. Remember that guys? Yeah, I do...there were some May fans that wanted May to not only be Misty's replacement, but a PERMANENT fixture in the show...lol, I know some people were disappointed...
Basically, she got her appearance, Misty got...the 'lure' reference....Meh...Oh well...
Do I think May is the only girl that she'll meet? Honestly I don't know...Do I care? At the moment, no...I'd much rather have the writers do another round of "Hoso Specials" or whatever they were called in AG so we can have another round of Pokemon Chronicles, or whatever. I'd rather them show Misty and the other characters like Casey, Tracy, Richie, etc growing and developing, and doing their own things. That's another thing that made AG great. That and the "Glory Day" ending.