Rob Dyrdek won't invest in anything that won't make a profit. EA stopped making skate because it declined in sales from OG to 2 to 3 (which is mostly due to the decine in quality because of the restricted turn around time.)
As much as I want another skate game, I doubt it will happen unless it goes the way of Shredsauce/BMX The Game and its developed by an indie dev with a kickstarter for funding.
A true skateboarding SIM is a pretty niche type of game so I doubt a major developer & publisher would be keen to take it on, where as games like THPS are more arcade and appeal to a broader audience because of how much easier it is to do crazy tricks, hence why most skateboarding games go this route.
My hope is we can get a community funded, for PC skate sim (having a game on pc makes everything easier, i.e. doing stuff like level editing and custom textures, also MODs.) whereas developing for consols is much more restrictive, time consuming and expensive.