I have an idea for resolving the Bittrex situation and resurrecting the coin.

Bittrex wants the dev to come up with a way to compensate people who paid BTC for NJA on their site.  Fully compensating all of them is of course not possible.  But you could fairly distribute partial compensation in this way.

Step 1 - Go back to the last version of the wallet before the hard fork that fixed POS was implemented.  Make a separate hard fork from here.  I will call this the "compensation fork."  On this fork, the billions of NJA generated by POS are considered valid coins, but POS is now disabled, or set to a ridiculously long stake time, to ensure that no new bad coins are created.  Get Bittrex to upgrade to this wallet after reviewing the plan.  The compensation fork wallet should be called something different like "ninjacomp-qt" so that it can run side by side with the current good wallet.  Also, use the original logo as the icon so users can easily differentiate.

Step 2 - Post an announcement explaining the following plan, and set a deadline for compliance.  2 weeks, 4 weeks, whatever.  Bittrex will make an announcement at the same time that they are delisting NJA at the deadline, and all coins will need to be removed before the deadline.  This should not be a problem because exchanges and pools get rid of coins all the time and coins not withdrawn are lost.  The Bittrex announcement will point people to the Ninja announcement explaining the compensation process.

Step 3 - Instruct Bittrex holders to download the compensation wallet and withdraw all of their coins to it.  Dev will post an address from the compensation fork wallet that everyone should send their coins to.  When sending their coins to the compensation wallet, they should sign the transaction with an address from the good wallet that their compensation can be sent to.  To show the community that the dev is really trying to make amends, he will also deposit the entire remainder of his premine into the compensation wallet.

Step 4 - Once the deadline is reached, Bittrex delists NJA, and any remaining coins are gone forever.  The dev will calculate what percentage of total coins in the compensation wallet (good and bad), minus the dev's premine, were deposited by each address.  Once this calculation is performed and recorded, the wallet.dat file from the compensation wallet is moved into the good wallet.

Step 5 - The good wallet with the wallet.dat file is opened, and the bad coins become invalid.  Each person who deposited coins into the compensation wallet get whatever percentage of coins they deposited sent to them from the good wallet.  So if someone deposited 1,000,000 coins into the compensation wallet, and that was 10%, and there are now 100,000 good coins, that person will receive 10,000 coins, or 10%.

This unique approach to compensation could generate interest in the community, with the main idea behind it being that the dev is working to get the value of the coins up and back on exchanges so that even though they have fewer coins, they will eventually be able to sell to get back what they spent on them, or even turn a profit.

The next phase would involve the dev working to add features to the coin to increase interest, while the community that has been compensated works to show the exchanges that there is a renewed interest in the coin via Twitter and other outlets.  I'm not a big fan of anon, but it seems like a perfect fit for a ninja coin, so I think that the first feature to be implemented would be to add a "stealth" option, where people can check a box in the wallet to enable "stealth mode" and conduct their transaction anonymously.