Bah. Went down when I typed out my response.
Ike will be more or less as heavy as Link. Ragnell, which was already a big sword, got bigger when rendered in Brawl. Big swords are heavy, thus the weight of the heavy sword will carry onto Ike as long as he holds it. And yes, this is implying Ragnell's weight + Ike = Link + Equipment. I guess accounting for that Hylian shield, Link should be one rank higher.
I think Ike will actually have average or below average attack speed. It really depends on his level of utility. If they give him his ranged attack, then the character can now bait and stun with projectiles changing their game entirely. Thus since he has a sword, heavy weight and a projectile, they need to compensate by making his melee game more cumbersome, kind of like Link. If he doesn't have the projectile, then they can give him "average" attack speed. Just my view on it.
Edit - As for Pit, after seeing the cutscene with Subspace Embisarry I realized he's a lot smaller than I imagined. This isn't helping the fact his bow, when split into short swords are, well, short. Though he has the ultimate mobility with the ability to fly and his incredibly running speed, which is complimented by having a flexible projectile. His biggest downfall will be his light weight and his short ranged (albeit disjointed) melee attack range. Based on the trailer, it looks like nearly every punch n' kick character can equal Pit in range. D: