I has been decided that the next event is Fantastic Four, and the top reward is one of the greatest comic book villains of all time...Dr. Doom. This event will be another raid event meaning players will complete missions and summon bosses they battle. If you want to read in depth on how Raid Events progress check Raid Events.
The Raider Cards for this event are:
UR ????: My guess here is an U Rare Mister Fantasic will come out out either right before the event or during the event if it follows previous events. Maybe they realized with the 99,999 damage cap though there is little reason to release an UR event card.
SSR Idol of Millions Thing: He will presumably do around 800% damage base.1800% damage fused. This will result in a cap of 99,999 damage. (Assuming he mirrors Professor X)
SR: Unseen Power Invisible Woman: She will presumably do around 500% base damage. 1200% damage fused. (Assuming she mirrors Psylocke)
SR2: Diamond Lady Emma Frost: She will presumably do around 400% base damage. 600% damage fused. (Assuming she mirrors She-Hulk)
Rare: Matchstick Johnny Human Torch: He will presumably do around 300% damage base.700% damage fused. (Assuming he mirrors Storm
Rare2: Mister Elastic Mr. Fantastic: He will presumably do around 200% damage base.300% damage fused. (This is assuming he is following Cosmic Energy Havoc)
Obviously the trick with raider events is to attain raider cards but there are some other ways to make sure you are successful. The first half of the event you should avoid using PP because once enraged bosses come out you gain additional damage. Instead, you should focus on summoning bosses striking them, and sharing them. When the bosses are defeated you gain shards which can be traded at a chance of personal PP. Once the enraged bosses come you can then use the PP.
On top of this, try to strike everybody's shared boss at least once. And remember when enraged bosses come you get charged less attack power to attack friends bosses. So during the home stretch it's worth it to heavily attack team mates bosses for the reduced power.
Try to only use raider cards in your deck if you can help it. In a vast majority of cases, using a single Diamond Lady over and over will yield better results than a Diamond Lady and four non raider cards.
Finally, if you have a team mate who's boss is never dying, stop hitting it and remove him from your team. Nothing is more annoying then spending attacking five of a teammates bosses only to have none of them go down.
For specifics and more information on raids, feel free to check out the posts on X-Men, Avengers, and the Raid Events Page.