If someone make 2 forks of Bitcoin then LTC is out as soon as that happens. Droping out of top10 coinmarketcap listing have nothing to do how good coin it just have a lot to do with new coins appearing on the list. Comparing coins that was very differently created by marketcap is dumb. It is like comparing apples with oranges.
Litecoin is fair launch PoW coin and is not blockhain fork of Bitcoin. On CMC we have most such coins let me list them for you.
1. Bitcoin BTC
2. Litecoin LTC
3. Monero XMR
4. Dogecoin DOGE
5. DigiByte DGB
6. Decred DCR
7. Siacoin SC
That is the top7 of coins that can be fairly compared with Litecoin by marketcap.