You mean like, asking: "Which topics?" or "WTH are you talking about?"
To be quite honnest:
1) So what if people make links to both games? There IS a link between both games, hence, the name Link. It's not just chosen because his name is Link, he actually has a link with the others. Even Ganondorf is the same Ganondorf / Ganon in each series.
2) Wind Waker can give some insight of what we can expect in Brawl. Believe it or not, dispite their differences, they do have a lot in common, and one follows the other (meaning, Twilight Princess predates Wind Waker in continuity chronologics).
3) It's still not sure if the Link from Wind Waker is going to feature. It's not confirmed until it's confirmed. It will only disappoint you if it doesn't. It will make you very happy if he does, but it will make you more happy when you don't actually expect him to be in. We expect Yoshi to be in, but does that make us happy? Yes, but not as happy as when it was not confirmed.