Thanks Virgo. appreciate it. Hey I just heard that they are discontinuing the invasion line, WTH is up with that? Im just getting in to the game..lol...So what packs do I need to get to have all available constructed decks available right now, like high elves and dark elves and whatever other factions may have come out I dont know about?
Yes, they have ceased development of Warhammer: Invasion. The reason? Most likely that it was unprofitable in one way or another; ways which have been discussed more thoroughly elsewhere on these forums - amongst others.
But hey, great that you're getting into the game! In a way it's probably easier (and cheaper in the long run) to do so now that they've ceased production, as the cardpool and rules set is more or less solid now (barring fanmade cards and rulings).
As Virgo pointed out, there are 5 deluxe expansions (Assault on Ulthuan, March of the Damned, Legends, Cataclysm and Hidden Kingdoms) and 6 cycles of battlepacks that have been released past the Core Set. The expansions greatly increase the cardpool of the available factions aswell as introduce new ones (Assault), add neutral factions (March, Kingdoms) or new game mechanics (Legends, Cataclysm). The battlepack cycles on the other hand work off themes, such as corruption and the Skaven (Corruption), rivalries between factions (Enemy), developments and the Wood Elves (Morrslieb), faction specific packs (Capital), questing and artifacts (Bloodquest), and finally battlefield focus and cheap legends (Eternal War).
Warhammer: Invasion does not, however, have such a thing as preconstructed decks, at least not officially (I know you only mentioned 'constructed' in this thread, but saw you use it in another one so I thought I'd specify it here while I'm at it). So unless you are willing to invest in all of it (and a couple of additional copies of the Core Set and Corruption Cycle) to get a full set of cards so you can make every possible deck available, I'd recommend checking out deckbox.org for some popular builds, look at older ones and work with what you've got, read up on the F.A.Q. and find what playstyle and faction suits you best by playing it with some friends!
Hope I've helped in some way!