First incorrect guess was

>!<s>Twist</s>

Second guess:

Are you are a:

>! Plot? (ie, a plot twist)

I can keep you grounded, or I can rile you up.
>! 'Plot' as in literally a piece of land, or 'plot' as in a scheme 

I can facilitate your travel, or I can discourage you from going.
>!'Plot' as in a plan of action, or an unexpected incident

a cyborg, a professor, and a statue, schizophrenic mind, and a sled.
>! All are the main focus of famous plot twists:  Blade Runner, ? , Planet of the Apes, Fight Club, Citizen Kane

Hint: As long as people desire entertainment, my forms are seemingly endless.
>! This fits the 'intangible' def of plot.  There are always new stories being made