A very recent tweet: Only way to get enough rear passenger headroom was to move the rear roof cross-car support beam. A bike will still fit no problem.
I wish we could see more of the inside of the car. I am a cyclist and would love to see the trunk space. I think they did the presentation on purpose at night, most of the videos of the inside of model 3 you can barely see any detail.
I can put my bike it the back of the Model S no problem. There is no way it will fit in the back of the 3. They really need to have a receiver hitch option on the 3 so I can put my bike rack on the back of the car.
if it were my choice, i would sacrifice rear passenger headroom to have a hatch (larger opening) in order to have this back room like model s (below).
You will have to remove the wheels but it will fit with the back seat down obviously. More good news!
This might partially redeem its lack of a rear hatch. If I could do a 2" receiver bike carrier, I could live with that. My wife and I both have e-bikes which are about 60 lbs each.
Really need more info on trunk space and access. Need to fit two sets of golf clubs, through the trunk.
If the opening isn't large on the horizontal plane, but it's quite tall. Then it would be like sliding a pizza into an oven.