All armies can work. Both as a rule and as a playable list.
AnswerAt the moment, GW do not make a set of rules for matches like that, so no, 40k armies can not play FB armies.== ==
No, in Warhammer 40k, each army must consist of units from the same faction. Mixing armies from different factions is not allowed in the standard rules of the game.
Answer All armies are legal in 5th edition.
No. The only armies in the game are Chaos or Space Marines. Being a necron player, I too wish they were in Warhammer 40k: Squad command.
Defineitley 40K.
I'm not sure what exactly your asking about creating an Apocalypse unit. All units are eligible to be an Apocalypse game. An Apocalypse game is usually defined by a game where each side has 3000 points. Read the Apocalypse supplement of the 40k rulebook for more information.
Yes. All armies are able to beat the other armies....... there is no "Win every game" army for you to play.
Answer Warhammer Epic is much smaller than 40K. It is also cheaper.
The Necron super heavy is the Necron pylon which is only available on the Forge world website.
Games Workshop made the Warhammer 40k Tabletop Game.
AnswerThere has probably been heaps of long games of Warhammer but it depends on how many points you use, for example, a 1500 point game could last 2 hours.Games of 40K Apocalypse have lasted up to more than 2 to 3 days. Games of Apocalypse have been known to go up to as long as 4 months.
This rule can be found in the Warhammer 40K rulebook, but due to copyrights we are not allowed to answer this question.