Midway Could Be Viacom Acquisition Target  LOS ANGELES (Reuters) - Media conglomerate Viacom Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=VIAb.N target=/stocks/quickinfo/fullquote"&gt;VIAb.N&lt;/A&gt; is considering expanding into the video game business  and could acquire publisher Midway Games Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MWY.N target=/stocks/quickinfo/fullquote"&gt;MWY.N&lt;/A&gt;,  according to a regulatory filing on Friday by Viacom chief  Sumner Redstone, who owns a controlling stake in Midway.