I'd generally suggest asking this question in the 4E forums. There are probably more there that can give you help on one-shots.4E is incredibly watered down however I have found a strange allure and
want to try and start at least one session what do die hard 3E fans and
4E fans suggest ?
Hi, Razz! Long time no see!The best way to get into 4E is to dive into it by sort of using self-hypnosis to rewire your psychology into completely forgetting anything you once knew or are presumptuous about previous editions of Dungeons&Dragons. It really is the beginning of a whole new game aimed at a whole new generation and once you accept it as such, you can actually have some fun with it.
If you expect anything more from it, however, I do suggest remaining with the more detailed and creatively complex 3rd Edition system which also stays much more truer to 1e and 2e in terms of mythology, lore, story, and even game mechanics, to an extent.
I managed to do that and had fun just creating a Warforged Ranger and Human Paladin for 4E, without having played it yet. It's self-delusion, yes, but it's the only way for some people, I've noticed, including myself.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.