Here is a list of all nations with less than 3 heroes. Some others have duplicate heroes across all ages (Arcos, Pangaea, MA/LA Abys, MA/LA Caelum), and could also use new heroes if you happen to have an idea.
EA Marverni: 1 normal +1 multihero
EA Caelum: 1 +1 multi
EA Helheim: 1 +1 multi
MA Mictlan: 2
MA Shinuyama: 1 +1 multi
MA Agartha: 0(2) +1 multi
LA Agartha: 0(1) +2 multi
(might get more if my Brothers of the Cave gets incorporated)
GOOD MONKEYS:
EA Kailasa: 1 +1 multi
MA Bandar Log: 0 +2 multi
LA Patala: 0 +1 multi
WATER NATIONS:
EA R'lyeh: 1 +1 multi
EA Oceania: 0 +1 multi
MA Oceania: 0 +1 multi
EA Atlantis: 1 +1 multi
LA Atlantis: 1 +1 multi
Any ideas?
Marverni: they'll get Boar summons, and sacred Boars. Including elephant-sized ones. So... Hog-knight of the Hoburg? Wereboar? A shapechanging mage? A really good Sequani Stargazer? A Sequani who left to study in the great city of Ermor?
EA Caelum: A Yazada multihero? A huge bird? An anormous Sping Hawk? An Icecrafter with good magic and forge bonus?
Monkey nations:
A monkey born discolored, so as to be of a different caste, or outside of them: a red Vanara, a white Bandar, etc.
Sun Wukong the Monkey King (
http://www.internationalhero.co.uk/m/monkey.htm) who is, among other things, invulnerable, indestructible by fire, lightning or over a month of alchemical fires of Lao Tsu of the Heavens, immortal, able to fly insane distances, can take forms of various objects (glamour), has a shape-changing staff (from the same source as the Spear of the Dragon King), etc.
EA R'lyeh:
Some ancient monolith/statue/spirit that precedes even the Aboleths.