Yevhenii Kulyuk, Technical Producer behind ST2, has said so in a recent interview to the YouTube channel called RadioTimes Gaming.
His exact words (are at 13:18 in the video)
"We are basically creating and preparing the very big toolkit, that will provide the mod makers with basically all necessary tools to create mods from smallest ones to big total conversions, so they can just throw all their energy to create something, something like, big."
I'd say I'm real doubtful, given "full modding toolkits" are often
heavily limited in what you can do for obvious reasons.
Shall wait, shall see.