The photos come from user mariimakii on Twitter, who gives credit to user Brittnayxxoxo. The images appear to show someone who looks a lot like Godspeed falling on a sign for the Central City Citizen. Another photo shows a poster for an exhibit at the Flash Museum, meaning that it's likely these photos are from the future.
One of #TheFlash exteriors today were stunts of Mr Godspeed (I assume) falling on a Central City Citizen sign. Rip sign :(— Maki (@mariimakii) February 23, 2019
(please credit @Brittanyxxoxo if reposting thx)@WhatsFilming @yvrshoots #DirectedbyDaniellePanabaker 😉 pic.twitter.com/yg6CBwMOtn
These photos look pretty legitimate, so it seems reports Godspeed will appear on the show have been confirmed. However, until an official announcement is made, it's probably best to treat this one as unconfirmed, since it's entirely possible that this is another speedster wearing a similar costume.
The images seem to give a good indication that appearance will have to do with the future timeline and may even be related to Nora West-Allen's deal with Eobard Thawne or Barry Allen's future disappearance. How much the character will change from the comics remains to be seen, but fans can will reportedly see the character in the 18th episode of Season 5.
Sharing the same name as the first Flash villain created for the DC Rebirth era by Joshua Williamson and Carmine Di Giandomenico, Godspeed was August Heart, a colleague of Barry Allen's with the Central City Police Department. Gaining powers from a Speed Force storm, Heart took on the persona Godspeed to kill those he deems criminals, especially fellow speedsters to gain their power, putting him on a collision course with the Flash.
Airing Tuesdays at 8 p.m. ET/PT on The CW, The Flash stars Grant Gustin, Candice Patton, Carlos Valdes, Danielle Panabaker, Tom Cavanaugh, Jesse L. Martin, Danielle Nicolet, Hartley Sawyer and Jessica Parker Kennedy.