LTC outperformed BTC (percentage-wise) during the last cycles. This cycle BTC Doubled from around 20K to 40K, which indicates, we can expect even a bigger move from LTC. First we need to see LTC breaking its ATH (All Time High) around $370, then Doubling in price from its ATH to around $740, then outperforming BTC . I don't see any reason why this cycle would be any different from the last cycles.
You can see here the difference in percentages between LTC and BTC from Bottom to Top for each previous cycle.