To be clear we will keep the old FCN blockchain, will start new repo and will develop FCN side-by-side with XDN.
Will the code for both coins be almost identical after your takeover, or will there be big differences in the two coins? Will FCN be using PoA (proof of activity) in addition to XDN? Is proof of activity going to be exclusively used in XDN and no other coin you develop?
No, source code will not be identical, FCN will have no PoA, PoA is an exclusive XDN feature.
We will make a major FCN update and will develop it as a classic proof of work coin with merged mining (FCN+XMR).
We will release major FCN network improvements, will increase default block size, etc. Later this year we will introduce GUI for FCN.
Will you be setting up and paying for an FCN website and block explorers? Will you be paying for nodes to keep the merged mining running until there is some serious interest from miners?
It's good to have a new dev revive FCN, I hope the improvements make it popular again.