Yes, txbit.io will have different trading pairs. Starting with major ones like BTC, ETH and of course XLR. Then more will get added as time goes on.
Solaris project should have massive promotion about txbit.io exchange several weeks before its launching time. More impressive promotions, more attention to the exchange at its beginning as well as Solaris project.
Statistics about today Solaris performances (price and masternode ROI):
https://masternodes.online/currencies/XLR/ (High ROI)
https://coinmarketcap.com/currencies/solaris/ (Potential chart)