Easter Egg?

In Metal Gear Solid 3: Subsistence, when you are fighting The Boss in thw white field of flowers, there are three white snakes. Their names are Liquid Snake, Solid snake, and Solidus Snake. Other than having the names of the Metal Gear Solid and Metal Gear Solid 2 "brothers" of Solid Snake, I'm wondering if there is more to them than just their names.