I'm sure Smash4 development began right after Kid Icarus Uprising development (or something along those lines) was completed, not to mention KI:U was an amazing game as well. As you know, Sakurai is the guy behind the Smash Bros franchise, and was the one behind creating KI:U as well. Knowing that information so far, it felt like a coincidence that Pit would appear as early as he did, and that only means that Kid Icarus stuff and Pit are gonna get a lot more attention compared to Brawl.
There's already the Upperdash Arm and Guardian Orbitars as moves, in which they were weapons introduced in KI:U as well. This only means that there will be more Kid Icarus goodness to come for Smash as time and development goes on. I myself am hoping Palutena will be playable, because since of that coincidence from going from completing KI:U development to Smash4 development right away, and seeing Pit as one of the first shown, who already shows signs of influence from KI:U (again, those 2 new weapons), it's like that KI will most definitely get a 2nd rep who will be revealed later, and that spot should belong to Palutena.
To make it short, signs point that the Kid Icarus series and Pit will get a lot more love in Smash4 compared to Brawl, and a lot more stuff, which is also likely for a playable Palutena to be shown in the future.
Although there was also Bowser from Mario as well, who started out as a Melee character that was shown in the trailer, but that's just something minor. Hope it all helps.