I have been a patriot of the previous Film base Lego games but this was a huge disappointment!
They've completely changed the system from the old one, Instead of a home where you can access the levels using doors (starwars) vehicles (batman) or maps (old Lego Indie) which you can wander around in, and have a single simple place to pay for the things you have collected, Each film has it's own world which you can wander around, and it's here that you collect red (and now green and blue) bricks by hitting say 10 things, no searching for things, or secret areas. The levels are shorter and there is now no free play, so you can play as whichever character you want, instead theres mini games which you require certain people for (e.g 'You need a spear to complete this level'). Because you wander around it's less clear how much of the 'film' you have completed, and you have to find the things you want or need to buy, or change into (no using the L1 and R1 buttons anymore! :-( )
All of these things makes this new game a HUGE disappointment, I haven't used the level creater but it doesn't look brilliant and probably takes a long time to master. The use of PSN would make it better for people with siblings but that's to be expected with the upgrade to the PS3 system.
If you haven't played the old games you may still enjoy this game, the actual way to play the game is the same, and it was vastly enjoyable in the old games after all, but you are much better off with the old PS2 games.