@TravisSch
Don't worry, Ferb has been seen in several videos, he'll show up at the same time as Phineas and Perry, I'm sure.
As for the others, it's possible that Frozone wasn't included because they wanted to save ice powers for the future Frozen figures. As for Pirates, I'm surprised Elizabeth and Will weren't included as figures or NPCs. The Pirates playset is, I believe, based on the first three movies, which is why Blackbeard and Angelica aren't involved. The end of the fourth Pirates movie implied that Angelica will be back and will play a significant role in the fifth Pirates, so it's possible there may be a second Pirates playset released to coincide with that movie in 2015, which may feature Angelica. I don't know why Sally hasn't been featured in the Cars games, how strange.
I think with a platform like Disney Infinity, there are
always going to be characters we wish were included, who seem like huge omissions. I know if I had it my way, there'd be figures of
every character, no matter how obscure!