I'm really excited to see how the planes work out in this game. I've got questions and ideas about some of the planes below, but I'd also like to hear what everyone else is thinking / excited about for planar travel.
Astral Plane:
I understand that the Teleport and Dimension Door spells make brief use of the Astral Plane to make their quick travels. Are we going to have spaceships that jump great distances through the Astral plane? Is a jump through the Astral Plane going to replace a FTL drive? That'd be cool and kinda crazy.
Ethereal Plane:
Will there be any ships with ether drives, that allow them to enter the ethereal plane? This would be way cooler than any cloaking technology the Romulans ever had.
How sick is this: The adventurers spot a wavy, smoke like form of a ship, roughly the size of an escape pod, floating its way towards them. The pod merges with the ship, slips into the cargo hold - and suddenly there are two or three small creatures, pilfering supplies from the hold.
The Shadow Plane:
The Shadow Plane is terrifying enough when connected to the material world. While I'm uncertain whether the plane of Shadow is weaker where there is hope and sunlight, in the vast emptiness of space there lurks the possibility for enormous monsters to hunt that plane.
Planar Anomalies:
Are we going to have any planar anomalies, where one of the transitive / outer planes is somehow transposed onto the material out in the vastness of space? Traveling along, could a ship accidentally pass through an invisible gateway to the plane of Shadow - and find their next excursion to port haunted by strange and unsettling occurrences?