Will be there an complete Mafia II ?
Please I want to now if the developers will make a complete game with all the cars (Greaser pack, war pack...) with all the DLC's, for an expensive price ?
This has not been announced. Until it's announced, we won't know if they're planning such a thing.
You can ask this question here:
But I am 99.99% certain you will get a similar answer to the one I just posted.
And before you ask, the same answer applies to releasing the pre-order packs separately, or other such related questions about what 2K will release for Mafia II in the future. It's all unknown, and we won't know until they announce it.