Thought I'd bring this back
I'd really like a greater amount of focus on the Avengers like X-Men are getting

Avengers - the main big team that also is an international team with many reserve members around the world whenever needed:
Iron Man
Captain America
Thor
Captain Marvel
She-Hulk
Captain Britain (Betsy)
Red Guardian
Guardian
Jean Grey
Namor
Hyperion
Stinger/Stature (Cassie)
Giant Man (Raz)
Magik
Ghost Rider (Danny Ketch)
Speed

Avengers Investigations - investigative team and would be awesome:
Multiple Man
Jimmy Woo
Masked Raider
Iron Patriot (Toni Ho)
POD
White Tiger (Ava & Angela)
Ant-Man (Scott)
Night Trasher
Annabelle Riggs

New Avengers - new team for the younger heroes:
Wiccan
Hulkling
Namorita
Goliath (Tom Foster)
Brawn
Eli Bradley
Karma
Stepford Cuckoos

Uncanny Avengers - team to unite Mutants, humans, Atlanteans, Inhumans, A.I./robots, and everything in between:
Arno Stark
Machine Man
Emma Frost
Shuri
Atlas Bear
White Fox
Hercules
Hulk
Angela

Young Avengers - the next generation of heroes:
Patriot (Rayshaun)
Viv
Honey Badger
Locust
Hummingbird
Water Snake
Vee
Pei
Armor
Nature Girl
Ultra Girl
Nova
Troll
Jolt

West Coast Avengers - west coast team:
Hawkeye (Kate)
Mach-X
Ms America Chavez
Superior Spider-Man
Fuse
Alloy
Tigra
Atlas (Erik Josten)
Vision
Wonder Man
Scarlet Witch
Quicksilver

Secret Avengers - black ops team:
Black Widow
Hawkeye (Clint)
Winter Soldier
Diamondback
Outlaw
Psylocke (Kwannon)
Scream
Conan
Scarlet Spider (Kaine)
Red Harpy

Supernatural Avengers - deals with the supernatural threats:
Man-Thing
Doctor Voodoo
Elsa Bloodstone
Vampire by Night
Daimon & Satana Hellstrom
Ghost Rider (Johnny Blaze)
Jennifer Kale

Ultimates:
Captain Marvel
Blue Marvel
Dr Positron
Cannonball
Sunspot
Smasher
Anti-Man
Spectrum
Voyager