One of the earliest title screens for TRTF4 was found in the comments from one of Gamejolt's posts from TRTF3, and Tyler's old Minecraft skin and wallpapers from NovaCraft Community since 2014.
The official audios for the canceled TRTF Volume 2 trailer, and a remix for the TRTF4 title theme for the major update that was discovered by Toonster recently.
A script from Ferguson talks about the gameplay of a teaser game called I.T. (Interactive Teaser). Plus, the logo of "I.T." was also found in the Gyazo link from the development chat document.
