* Map editor: In the first Crysis I loved to build a tower with 10.000 barrels and make it drop (2 FPS lolol).
* Downloadable content: Especially for multiplayer, map packs should be made from time to time to keep the player excited. Also, weapon packs should be pretty cool too, anyone who plays MW2, knows that the weapons get boring after a time.
* Patches!: After the Crysis 1.2 patch (I'm talking about single player), they left Crysis behind, I still play Crysis, and some of the bugs that aren't fixed can get annoying at times.
* Collector's Edition: No explanation needed.
* Last but not least: I hope they've kept the game fresh and original like the first one, and I hope to that we'll be able to judge this ourselves soon (Beta dammit!)