I think it is unknown in today's world if Superphotonic travel will ever be possible for things other than some particles on the atomic scale (and I admit I'm not a science major)
Wormholes are not superluminal travel in a strict sense, since special relativity is a local effect, and locally the speed of light is not exceeded.
As for FTL... It is entirely possible that the foundation of modern physics is false, but currently there are many reasons why matter with mass/information cannot reach c (and why massless matter must travel at c, but i won't go into that). The easiest to explain are time dilation and length contraction.
As an object accelerates, an outside observer views it's time slowing and it's length, contracting. At 0.86 c (relative to the observer) the object is aging at half the speed and it's length is half it's length at a standstill. At c the object would not age, and it has no length. This is bad. Any faster and the object's demensions (both space and time) would be negative. This is really bad.
The theory is entirely plausible, even for the real world. Wormholes are, in lamemans terms, tunnels in space
I really dislike this analogy. Unfortunately, I can't think of one that is as easy to understand and more accurate. And It isn't
entirely plausible, since the amount of energy required to create and manipulate a stable wormhole would be much higher then all the energy generation by powerstations on the earth in the last hundred years.
there was once a time when people thought we'd never break the sound barrier and safely travel faster than the speed of sound, as well as a time when people thought we'd never have working aircraft of any kind.
And I continue my efforts in proving them right!
Edit: As always, i'm arguing for the sake of arguing, not suggesting a change in the game.