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Breaking down the current issues with sourcing in this article:
anime-source.com - Would not meet notability, appears to be fansite. Not on list of WP:A&M/ORS
daishocon.com - Primary source, are there secondary sources to back up this information?
channelawesome.com - Guests of the convention, so conflict of interest issues. Also not a reliable source for convention news.
WAOW hotel closing article - Only concern here is the con is not specifically mentioned. Cons move hotels all the time, it's not really notable.
plattevillegaming.com - Seems to be a gaming association and not an news/reporting site, so notability cannot be established.
I would contend that most of the information from these sources should be removed, minus the WAOW article being borderline. Esw01407 (talk) 14:07, 19 February 2016 (UTC)
Continuing discussion on sourcing:
forums.animecons.com - Forums are not good sources, they can be edited, no editorial oversight.
ANN Press Release - I've reworked to use it, but it's not a great source due to it being outdated. A more recent source would be better.
Nerdandtie - It's hard to establish them as a source at this point, while there coverage is good, it really didn't match up to the points the sentence was trying to make. Esw01407 (talk) 15:08, 12 April 2016 (UTC)