I've compiled data below to help determine that WorldCoin is most probable to be listed at BTC-e based on daily trading volume. For a coin to move to a bigger exchange, a moderate 24hr volume of BTC must be traded using that pair. Once that volume becomes too low, the pair is often de-listed.
This list of coins are the next 8 candidates (listed in order of highest current market cap) found at http://coinmarketcap.com.
The past 60 days of data were used from the logs located at http://www.cryptocoincharts.info. Date range was Sept 23 – Nov 21, 2013.WorldCoin - WDCDaily AVG Volume
274 BTC (per 24hr)
60-Day AVG Price .00011
60-Day Total Volume 16,493 BTC (149,943,738 WDC) mcxNOW/Cryptsy
60 Day HIGH Volume 1,687 BTC (15,339,236 WDC on Oct 7, 2013)
CryptogenicBullion - CGBDaily AVG Volume
13 BTC (per 24hr)
60-Day AVG Price .002
60-Day Total Volume 829 BTC (414,898 CGB) Cryptsy/Coin-e
60 Day HIGH Volume 37 BTC (18,631 CGB on Oct 10, 2013)
Megacoin - MECDaily AVG Volume
14 BTC (per 24hr)
60-Day AVG Price .000075
60-Day Total Volume 868 BTC (11,575,997 MEC) Cryptsy/Bter
60 Day HIGH Volume 32 BTC (431,327 MEC on Nov 12, 2013)
Devcoin - DVCDaily AVG Volume
8 BTC (per 24hr)
60-Day AVG Price .0000003
60-Day Total Volume 501 BTC (1,672,498,630 DVC) Cryptsy/Vircurex
60 Day HIGH Volume 74 BTC (124,501,631 DVC on Oct 9, 2013)
IXCoin - IXCDaily AVG Volume
4 BTC (per 24hr)
60-Day AVG Price .00009
60-Day Total Volume 228 BTC (2,543,156 IXC) Cryptsy/Vircurex
60 Day HIGH Volume 27 BTC (302,085 IXC on Oct 31, 2013)
CopperLark - CLDaily AVG Volume
24 BTC (per 24hr)
60-Day AVG Price .000275
60-Day Total Volume 1,474 BTC (5,363,454 CL) mcxNOW/upBit
60 Day HIGH Volume 242 BTC (883,557 CL on Oct 9, 2013)
Digitalcoin - DGCDaily AVG Volume
15 BTC (per 24hr)
60-Day AVG Price .00009
60-Day Total Volume 916 BTC (10,181,099 DGC) Cryptsy/Vircurex
60 Day HIGH Volume 58 BTC (646,182 DGC on Sept 29, 2013)
FreiCoin - FRCDaily AVG Volume
2 BTC (per 24hr)
60-Day AVG Price .00003
60-Day Total Volume 99 BTC (3,319,889 FRC) Cryptsy/Vircurex
60 Day HIGH Volume 7 BTC (228,062 FRC on Oct 16, 2013)