There are no spoiler points in the game. Cards will come out differently each time which means you are facing a different challenge each time you play. I have over 40 plays of Alien & Predator under my belt now and I am consistently satisfied with the level of game-play. Being tied to the movies means that if you've seen them you won't have anything spoiled. Go ahead and play now. you won't ruin anything!
I sleeved mine (but I am an obsessive sleever especially with games where constant shuffling is a major factor like deck builders. I even went one further and used specific colors for specific decks. I used Lime Green for the alien/hive decks, black for the player/barracks decks, red for the wounds, etc. Makes for a nice presentation on the table ;P
Thanks for no spoiler thing . Just thinking it might be more fun to see the cards together for the first time. Will have to consider.
YES, YES and YES. I am also obsessive with sleeving, EVERYTHING .
Yes that's the correct card size.
I would recommend learning the rules or the legendary mechanic, which is similar throughout all their games so watching any game video will be a big help.
It is also helpful to sort the cards before your game , are buying second hand? If so they may already be sorted. If it is a new game and you have never played a legendary UD game then I recommend finding a video on sorting the cards.
I was lucky enough that the guy already sorted the stuff, he even returned it for a new copy since 5 cards were missing.
Thanks for the fast answers.