I'm pretty sure that all the single carded Ninja Turtles movie figures will be evenly packed and should all be easy to find, but if for some reason they're not-- and you want them all-- then Playmates has you covered with this boxed set containing all four of the Turtles.
The harder figures to find will most likely be the other characters-- especially April-- so if we're lucky-- and Playmates is smart-- they'll release another boxed set containing the other figure figures, too.
We're also finally getting our figure real look at the final production version of Megan Fox as April O'Niel. I think Playmates did a pretty nice job making her look like the actress. The articulation looks extremely limited though, which is always a bummer.
These are just hitting stores now, so keep your eyes peeled!