2. Robert Downey Jr.
The next clue came today from part two of a five-part Entertainment Weekly interview with Robert Downey Jr. and is a little more subtle. In addressing the possibility of cameo appearances of Stark's friends from The Avengers, RDJ answered the question first by explaining that Iron Man 3 needs to acknowledge that this is a post-Avengers world but at the same time find an interesting way to focus on Tony Stark's personal journey. He followed that up with this:
"But we can't help it — everywhere you look now in every Marvel movie there are opportunities where certain new pals of his could be useful. So they’re in the atmosphere, so to speak, but I wouldn't expect to see them on the ground in this one."
Very choice words in "atmosphere, so to speak" and not seeing "them on the ground." On its own, it may not be much, but combining with the other evidence and rumors, and knowing RDJ's tendency to say or tease things he's not supposed to (see: Avengers premiere), this could be a major hint that he's referring to Stark's soon-to-be space friends.
3. The "Deep Space Suit"
Toy manufacturer Funko released some images they weren't supposed to for their upcoming Iron Man 3 line of tie-in merchandise, including the following image which was suspiciously removed from their site (note: the four other armor designs are all confirmed to be in the film):
[Image removed at the request of Funko]
Now why would Iron Man have a Deep Space Suit, we wonder?
For the normal action figure lines, Iron Man 1 & 2 (and most comic book movie tie-in merchandise) had armor designs and villains not from the actual film, but this isn't your typical action figure line and seems to be specially designed bobble heads for the actual armor suits from the film.
The armor design depicted in the bobble head pays slight tribute to the first space suit Tony Stark designed in the comics back in 1981 (Iron Man #141), with the chest light taking the same pentagonal shape instead of the circles and triangles we've seen in the film armors thus far.