Yes. Elemental Hero Neos can be Contact Fused with two other appropriate Neo-Spacians to form the following cards:
Yes, Rainbow Neos is the fusion
Yes, "Future Fusion" can be used for "Rainbow Neos" by sending an "Elemental Hero Neos" and a "Rainbow Dragon" or "Dark Rainbow Dragon" from your deck to the Graveyard.
Rainbow Neos is a fusion of Elemental Hero Neos, and either Rainbow Dragon, or Rainbow Dark Dragon.
If the E-Hero trying to be Fusion Summoned requires a nonspecific E-Hero (such as "E-Hero Absolute Zero), then "Neos Alius" can be used. If the Fusion Monster requires "E-Hero Neos", "Neos Alius" cannot be used since its card name cannot be treated as "E-Hero Neos" while in the Graveyard. (Though this only applies to "Rainbow Neos" who actually is not a E-Hero fusion monster.)
Rainbow Neos is a fusion card which you need the Elemental Hero Neos and Rainbow Dragon on the field or hand and use Polymerisation .
Blue-Eyes Ultimate DragonXYZ-Dragon Cannon (Contact Fusion)Ojama KingElemental Hero Storm Neos (Contact Fusion)Elemental Hero Magma Neos (Contact Fusion)Elemental Hero Chaos Neos (Contact Fusion)Chimeratech Overdragon (Fusion Summoned with at least 2 monsters)Cyber End DragonArcana Knight JokerArmityle the Chaos Phantom (Contact Fusion)Gladiator Beast Heraklinos (Contact Fusion)Super Vehicroid Jumbo DrillUltimate Ancient Gear Golem
Depends on the type of Elemental hero's neos. Example: Elemental hero aqua neos or Elemental hero divine neos,..etc.
There is no card called "Miracle Contact" so:If you are referring to using "Miracle Fusion" with "E-Hero Neos Alius" (when not Double Summoned), then you can use it if the Fusion Material monsters does not call for a specificE-Hero. If the Fusion Material monster required is "E-Hero Neos" then you first need to Double Summon "E-Hero Neos Alius".If you are instead talking about using "Contact Out" on a Neos Fusion Monster and Special Summoning "E-Hero Neos Alius" from your deck, you can not since while it is in the deck it's name is not "E-Hero Neos".
Rainbow Neos 'cannot' be special summoned except by Fusion Summon of the listed components. There is no way around this, not even cards like Metamorphosis or Cyber Stein.
No, nowhere on the card does it even imply that happens.
No, the 'Neos' fusion monsters state how they must be summoned on their cards. The monsters must be returned from field to deck, you can't summon them like regular Fusion monsters using a fusion card and components in hand.
Elemental hero neos is a normal monster so there for it is not a fusion and no cards combine to make it.