Now that we know Echo Fighters can borrow traits from two or more characters, one Echo Fighter I'm hoping to see is Magnus. Mine idea is that he could borrow mainly from Cloud, Shulk, and Ike. He could have mostly Cloud's moves, but Ike's physics. In Kid Icarus: Uprising, Magnus uses kicks and sword slashes. When Pit wields Magnus's sword, he can create shockwaves and whirlwinds. So basing him on Cloud would be ideal. He could basically be a rougher, less slippery version of Cloud whom relies more on reads than combos. In battle, Magnus combines keen intellect with brute force--and that is a deadly combination. He avoids unnecessary combat whenever possible, and is not ashamed to fight dirty.
I honestly believe Magnus was remotely considered for Smash 4, but was ultimately made into an Assist Trophy. Why? Same reason Chrom became Robin's Final Smash. Sakurai is clearly biased toward Kid Icarus: Uprising, given the new items. So I fancy that bolsters Magnus's chances.
A rough moveset I threw together:
Neutral Special (Shockwave): A stronger version of Cloud's blade beam that travels a shorter distance. The move comes out slow, but the beam is fast and powerful. Derived from the Magnus Club.
Side Special (Shield Smash): A stronger version of Shulk's Back Slash. Instead of dealing more damage from behind, it has high shield pressure, making it a bad move to block. Amount of pressure is proportional to the vertical distance at which this move is used. In other words, if Magnus is high in the air when he uses this move, it's pretty much guaranteed to break a shield.
Up Special (Air Slash): A slower, stronger version of Shulk's Air Slash. Guaranteed to kill at high percentages.
Down Special (Tornado): A weaker version of Cloud's "Finishing Touch". Deals multiple hits. Main purpose is to avoid rushdown, as well as punish dodges. Inspired by the Magnus Club.
Jab: Cloud's jab.
Dash Atk: Ripped from Koopa's dash attack. In KI: U, Magnus has a similar dash attack.
Tilts: Cloud's tilts.
Smashes: Cloud's smashes.
Aerials: Basically Cloud's aerials, sans the down-aerial, which is based on Ike's.
Grab & Throws: Could be a mix between Cloud and Ike's throws. Down-throw could combo into Air Slash. Back-throw could combo into Shockwave.