One of my ideas that I never got around to doing was a speedster with a "light speed" gimmick. Kinetic melee explained away as your character moving so fast that it can't be seen by the naked eye and the movement generating so much kinetic energy that it causes mini shock waves. Think of that first power as the character vibrating their arm at supersonic speeds then thrusting it forward suddenly. It's discharging a huge amount of energy that would be the physical equivalent to getting punched. The long range moves and tier 9 attack are all about vibrating so fast that the air particles start to heat up and take on energy, then giving the burst of super-heated, kinetically charged air a shove towards the target. The secondary could be either Super Reflexes, Regeneration or even Invulnerability. Super Reflexes is a given, Regen could be explained as a super fast metabolism to match the speed, and Invuln could be explained away as your body vibrating so fast that it deflects most typical attacks. It even has a weakness to psionics and energy attacks which would be able to bypass or interfere with the vibrations respectively. Throw in the super speed travel power or, if you had access to it: the prestige sprint with super speed lines stacked with ninja run to avoid the super speed pool all together and make your speedster able to jump higher as well as being nimble and acrobatic. Would make for an awesome setup.
There's also the fact to keep in mind of Synapse/Neuron, the games resident speedsters, both being Elec/Elec blasters. It's definitely more in the vein of The Flash to go with lightning powers, but Elec blasters or melee toons could pull off the gimmick well, especially considering Lightning Rod is essentially a "teleport to location and explode" move, which is very speedster-y. Dark powers could work for a sort of sinister/anti-hero "speed of dark" character if you wanted to put an unusual spin on it. Just to be different, you could even go with a fire power toon, probably something ranged, and play it off as you vibrating quickly and superheating the air around you to generate fire. Add the fire path aura to super speed (or the afore-mentioned ninja run + prestige sprint combo) and you have a speedster that's so fast he sets the ground on fire behind him ala the Delorean.
There's plenty of ideas if you're clever about using them, and I honestly think that the speedster concept is better portrayed by being able to launch attacks quickly and move around fast without getting tired, so as long as your character has high recharge and recovery that's the big thing. It will FEEL like you're playing a speedster then when you can fire off a bunch of high-tier attacks in succession and still be able to keep on trucking. Having high inate defense would help too as that would help avoid a ton of resistance toggles that drain endurance. Can you tell I put a lot of thought into this?
