Crystal Dynamics' staff share their excitement in an announcement video that especially made for the 25th anniversary celebrations of the Tomb Raider series:
The celebration of the 25 year gaming legacy will start on the 1st week of February. Each month will be dedicated to a different game in the franchise with nostalgic content, retrospectives, community features (such as fan art, interviews, livestreams, cosplay highlights, etc.), and surprises here and there.
While Crystal Dynamics doesn't have plans for a major game announcement in the near future, franchise game director Will Kerslake hinted/teased something super exciting:
We envision the future of Tomb Raider unfolding after [the rebooted trilogy], telling stories that build upon both the breadth of Core Design's and Crystal Dynamics' games, looking to unify these timelines.
They also ask everyone to be patient as they go through the development process.