Okay so I'm just, looking at the trailers we've got and I think I have an idea of what could possibly be the order events that play out before we get the bike, because we see Samus in MULTIPLE areas with her Varia Suit, NOT her VIOLA suit. I am under the assumption that the Viola Suit is the only way she can ride her bike. Lets see if this order holds:

1. Samus arrives on Tanamaar, and does all the stuff shown at the treehouse footage, including fighting a major boss named "Aberax" and then landing Sylux on fraud watch before being consumed by the artifact.

2. Samus arrives at the jungle, but not how she arrived in the beginning of the "open doors" trailer. That portal may be for something else entirely (like maybe it could serve as fast travel, connection between far away rooms, or it could maybe be a time travel thing!). I know this because Samus seems to already have psychic powers in this shot. I assume this is a powerup she will obtain in the jungle.

3. I'm debating on if the jungle will be explored thoroughly or if we leave it temporarily, then return to it for a bit. I will go with it (or at least the first half) being explored thoroughly. This part of the area will be capped off with Samus fighting Carvex, much like how she fought Flaaghra in the Chozo Ruins. After this point, she's allowed to leave. (I noticed just now that Samus has 10 missiles when stepping into the desert, and while fighting Carvex).

4. Here, Samus arrives at the desert. I expect for it to be a moment where you really feel the blistering heat and scope of the desert as you're forced to trek the whole place on foot, before finding yourself at the dark skytown like area

5. Once Samus arrives at the skytown area, I think she may explore a few more corridors, and THEN obtain the Vi-O-La suit, and subsequently, the bike. 

That's my view of how things will go, there'll be a surprising bit of the game to do before we get access to that damned bike.



Possible order of events leading up to getting the bike