New coins cannot simply lead a bull season. Those altcoins that are already on the highest ranks will themselves lead the bull market of the alts. You cannot expect newcomer altcoins to lead the old-timers like ETH, LTC, XRP, and the rest. These coins are definitely the top choices when Bitcoin holders start accumulating altcoins.
New or the existence of a coin does not determine the surge in price of coin because the concept, utility and community support level are worth determine the strength of coin in market either bullish or bearish season.
Have you guys notice that alot of new coins actually claimed the top 100 slot which belong to some long existing coin so don't underrate the new coin.