Lex Luthor invades Latveria

Lex Luthor has had enough. He's fed up with the arrogant audacity of Victor Von Doom. The presumption of the man to imply that Luthor's intellect is second to Doom's is galling.
Luthor has a plan. He plans to invade Latveria, oust Doom, and set up a puppet government that answers only to Luthor. This will teach Doom the true humility that Doom deserves.

Luthor gathers a team of villains; his Legion of Doom, and recruits them to help him invade Latveria.

His team consists of these:
The Joker
Bizarro
Brainiac (In anticipation of the Brave and Bold Set)
Sinestro
Giganta
The Cheetah
Black Manta
Captain Cold
Gorilla Grodd
The Riddler
The Scarecrow
Solomon Grundy
The Toyman
The Royal Flush Gang

Dr. Doom; being no fool, keeps a close eye on everything someone as dangerous as Luthor does and realizes he'll need support to defend against the invasion.

In addition to his Doombots he cooks up another means to blackmail Namor into working for him.

After that he turns to his Secret Wars allies, finding a way to force each and every one of them to serve his cause:

Molecule Man
Dr. Octopus
Ultron
Enchantress
The Absorbing Man
Titania
Volcana
Klaw
The Wrecking Crew
and also obtains the services of Venom