Speculations on SpaceX's Starship new fin configuration

Seeing most recent hardware delivered at SpaceX's Boca Chica launch facility in South Texas, where the Starship Mk 1 prototype is being built, Reddit user u/ModeHopper has done some pretty impressive pixel-counting & calculations, speculating that the new hardware is Starship's rear fin or its part. And William Falconer-Beach has already made some renders with several possible configurations of the new fins. More of his Starship renders here.

Development phases of SpaceX Starship by Colin Doublier

Sketch of the development phases of SpaceX's Starship by French urban artist Colin Doublier. More of his art here.

Dawn of a new Space Age

Photo of SpaceX's Starhopper at sunset by Jaime Almaguer. The Starhopper (test vehicle of SpaceX's stainless steel Starship) is currently being built in SpaceX's Boca Chica launch facility in South Texas and scheduled to fly first test flights in March/April 2019.

Photo of SpaceX's Starhopper (official)

Today Elon Musk tweeted the photo of the actual Starhopper (the shorter test vehicle of SpaceX's stainless steel Starship) built in SpaceX's Boca Chica launch facility in South Texas and sheduled to fly first test flights in March/April.

Official schematics for Big Falcon Rocket v2018 by Elon Musk, SpaceX

Today SpaceX CEO and lead designer Elon Musk provided an update of SpaceX Big Falcon Rocket (BFR) design and announced the first BFR Lunar mission, orbiting the Moon in 2023.

Here are video, schematics and images from his presentation (open link in new tab to view image in full resolution). Animations of the Big Falcon Rocket from presentation HERE.

Big Falcon Rocket (BFR) and Big Falcon Ship/Spaceship (BFS) v2018 schematics:

Big Falcon Rocket launch:

"Making life multiplanetary". Official schematics for BFR by Elon Musk, SpaceX

Today SpaceX CEO and lead designer Elon Musk provided an update of SpaceX vision to make life multiplanetary and colonize Mars. Previous name for the colonization class SpaceX booster&spaceship - "Interplanetary Transport System" - has been dropped and now Musk referred to it by the old acronym - BFR*.

Here are video, schematics and images from his presentation (open link in new tab to view image in full resolution):

Lunar surface missions:

SpaceX Mars mission architecture and Mars Base Alpha buildup:

Official schematics for Interplanetary Transport System by SpaceX

Today SpaceX CEO Elon Musk finally detailed his plan of building an Interplanetary Transport System (formerly known as "Mars Colonial Transporter") for colonization of Mars and beyond. Here are some schematics and images from his presentation.
His full presentation you can watch here and download as PDF here.