What we know so far

A couple of months ago, the team at Denki Games were able to recover a DVD containing a series of clips showcasing the games they and Minds Eye, the developer of the trilogy, had developed for Sky Gamestar around mid 2004. This DVD happens to contain short (approximately 1 to 2 minutes long) clips of gameplay of the Tomb Raider Apocalypse trilogy

Link with timestamp to Tomb Raider footage: https://youtu.be/vYE8mNxjpvs?feature=shared&t=2439 Additionally, a link to all archived footage of Tomb Raider games on Sky: https://www.youtube.com/playlist?list=PL8hlo7eOUeWLWgjqdjJKIQKXb6A2mQENi

Furthermore, we know of an unreleased Tomb Raider game that was meant to release in around 2005 time, known as The Temple of the Dead - this was in development but was put off presumably due to the acquisition of MEI by Disney's interactive division Wiki article: https://tombraider.fandom.com/wiki/Tomb_Raider:_The_Temple_of_the_Dead